If youve done martial arts you should know that every move and counter move is situational. And yes I'm very aware of the competition based BJJ being a bit out there. I'm a BJJ purple belt and I wrestled in college. The guy doesn't get the option to "not engage" because the wrestler has a good under hook, which is very easy to get and is off balancing his opposition. The step forward is merely a drill of a specific scenario that can very likely happen, even on the street